The correct answer to number 13 is
Americans were concerned that they were inferior to Soviets in terms of science, technology, and missiles.
This is due to the fact that Sputnik was a Soviet satellite that was the first to successfully orbit the Earth. This was the beginning of the space race, as the US and Soviet Union competed for space accomplishments and advancements in science.
The correct answer to number 14 is
The Truman Doctrine was a shift from isolationist policy because the belief that it was the US responsibility to stop the spread of communism to weaker countries around the world.
This is why Truman and Congress provided $400 million in aid to Greece and Turkey after World War II.
The correct answer to number 15 is
Stop the spread of communism by increasing US presence around the world and supporting democracy and capitalism.
This policy of containment resulted in the US getting involved in the Korean and Vietnam Wars.
The correct answer to number 16 is
Make sweeping claims against people with no evidence to back charges.
The name of McCarthyism came from Joe McCarthy, who claimed to have a list of over 200 people in the US State Department that were communists. However, he could never prove these claims.
